The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 25, 1988
Filed:
Sep. 30, 1986
Wade S Mitchell, Buckingham, IA (US);
Deere & Company, Moline, IL (US);
Abstract
An apparatus for controlling the moisture content of sand as it is transported from storage to a mold making apparatus. A conveyor is used to transport a substantially uniform layer of sand at a known rate. The electrical resistance across the sand layer is measured using a series of electrically conductive members that extend into the sand. A thermocouple or other contact device is used to obtain an average temperature of the sand layer. The electrical resistance and average temperature measurements are used in a signal processor to calculate a starting moisture content for the sand. The signal processing unit also calculates an amount of water that should be added to the sand to achieve a computed moisture content value. The signal processing unit further controls the means for adding the water to the sand so that the computed moisture content value is obtained.